The MAX8556/MAX8557ETE low-dropout linear regulators operate from input voltages as low as 1.425V and are able to deliver up to 4A of continuous output current with a typical dropout voltage of only 100mV. The output voltage is adjustable from 0.5V to VIN - 0.2V. Designed with an internal p-channel MOSFET pass transistor, the MAX8556/MAX8557ETE maintain a low 800μA typical supply current, independent of the load current and dropout voltage. Using a p-channel MOSFET eliminates the need for an additional external supply or a noisy internal charge pump. Other features include a logic-controlled shutdown mode, built-in soft-start, short-circuit protection with foldback current limit, and thermal-overload protection. The MAX8556 features a POK output that transitions high when the regulator output is within ±10% of its nominal output voltage. The MAX8557ETE offers a power-on reset output that transitions high 140ms after the output has achieved 90% of its nominal output voltage. The MAX8556/MAX8557ETE are available in a 16-pin thin QFN 5mm x 5mm package with exposed paddle.
Feature
- 1.425V to 3.6V Input Voltage Range
- Guaranteed 4A Output Current
- ±1% Output Accuracy Over Load/Line/Temperature
- 100mV Dropout at 4A Load (typ)
- Built-In Soft-Start
- 800μA (typ) Operating Supply Current
- 150μA (max) Shutdown Supply Current
- Short-Circuit Current Foldback Protection
- Thermal-Overload Protection
- ±10% Power-OK (MAX8556)
- 140ms Power-On Reset Output (MAX8557)
- Fast Transient Response
- 16-Pin Thin QFN (5mm x 5mm) Package
Applications
- Automated Test Equipment (ATE)
- Base Stations
- Networking
- Optical Modules
- Point-of-Load Supplies
- Servers and Storage Devices
